TONIGHT IS A BIG NIGHT FOR N-B-C AS JAY LENO HOSTS THE TONIGHT SHOW FOR THE LAST TIME. JIMMY FALLON WILL TAKE OVER, BECOMING THE 6TH PERSON TO HOST THE SHOW IN 60 YEARS. JAY AND JIMMY SAT DOWN WITH MARK BARGER TO TALK ABOUT THE EARLY DAYS OF JAY'S "TONIGHT SHOW" RUN AND TAKING OVER FOR JOHNNY CARSON. "LET'S SEE HOW YOU ALL FEEL IN 30 YEARS." IT HASN'T QUITE BEEN THAT LONG.... BUT, NEARLY 22 YEARS SINCE JAY LENO'S VERY FIRST "TONIGHT SHOW". "YOU MADE ME FIRST GUEST...I DIDN'T WANNA DO IT." IT WAS A NIGHT LENO PREPARED FOR BY SUBBING FOR JOHNNY CARSON MORE THAN 300 TIMES. "DO YOU REMEMBER IT FEELING ANY DIFFERENT THAT FIRST NIGHT YOU WALKED OUT FROM BEHIND THE CURTAIN?" "IT FELT DIFFERENT, BECAUSE IT WAS 'LIVE/LIVE'. SO ANY SCREW UP YOU COULDN'T EDIT OR CHANGE, SO IT WAS INTERESTING." "HOW LONG DID IT TAKE, OR WAS IT THAT FIRST NIGHT, THAT THE SHOW TRULY FELT IT WAS YOURS?" "I WOULD SAY, PROBABLY LAST THURSDAY, WHEN I WAS JUST GETTING MY GROOVE. PROBABLY LAST THURSDAY, YEAH." "THE WAITRESS WILL COME BY AND GET YOUR DRINK ORDERS" LENO WAS 42 WHEN HE TOOK OVER FOR A 66 YEAR OLD CARSON.... NOW, AT 63 LENO'S HANDING OFF TO THE 39 YEAR OLD JIMMY FALLON. "WHAT'S IT GOING TO BE LIKE FOR YOU THAT WEDNESDAY IN APRIL WHEN SOME POLITICIAN GOES OFF THE RAILS, AND YOU DON'T HAVE THE SHOW TO GO ON THAT NIGHT?" "DOH!!! HOPEFULLY, I'LL SEND HIM A JOKE." "WHENEVER HE WANTS TO, HE CAN JUST COME IN. PLEASE, HE'S JAY LENO. " "HE SAID THE NSA CAN NO LONGER VIOLATE ANYONE'S CONSTITUTIONALLY PROTECTED RIGHT TO PRIVACY. THAT'LL OF COURSE WILL BE TARGET'S JOB!" AND FOR THE PAST 17 SEASONS LENO'S BEEN THE RATINGS KING OF LATE NIGHT. MARK BARGER, NBC NEWS. JAY LENO'S FINAL SHOW AIRS TONIGHT AT 11:35 ON WXII 12. HIS GUESTS TONIGHT WILL BE BILLY CRYSTAL AND GARTH BROOKS. A FEW SURPRISE GUESTS ARE ALSO EXPECTED. JIMMY FALLON TAKES OVER AS HOST OF "THE TONIGHT SHOW" ON MONDAY, FEBRUARY 17TH.

Gen. David Petraeus pleaded guilty to federal charges Tuesday to end a probe into whether he provided classified information to his mistress when he was CIA director, according to a U.S. official briefed on the matter.